Analysis manner and its device null of trace impurity in nitrogen

摘要

PURPOSE:To enable a small amount of impurities within nitrogen gas to be analyzed accurately and with an improved precision by eliminating the nitrogen gas suction by connecting a sample gas to a TiMn hydrogen occluded alloy for completely eliminating influence of nitrogen constituents. CONSTITUTION:A nitrogen elimination column 9 and a sample gas conduit 7 are set communicating and then a carrier gas is fed to a carrier gas conduit 2 by a high-pressure gas cylinder. On the other hand, nitrogen gas of sample gas is allowed to flow to a sample gas flow conduit 4, a six-way valve 6 is switched for communicating with a sample sampling pipe 5 and the conduit 2, and a sample gas of a sampling pipe 5 is flowed to the column 9 through the conduit 7 and a valve connection pipe 18 by a carrier gas. The flown nitrogen gas is sucked to a TiMn hydrogen occluded alloy which is activated previously within the column 9. However, impurities gas within the nitrogen gas cannot be sucked and only impurities gas passes through the column 9 and are flowed into an analyzer 1 through the conduit 7, thus achieving analysis without being influenced by nitrogen constituents.